What prepositions should I use?

[neo29]

Hello,

Right now I'm sort of proofreading English translations and I have a dilemma which preposition should I use in the below mentioned sentence.

for newly registered companies PREPOSITION the portal w-w-w.example.com
posting one job PREPOSITION w-w-w-.example.com

Thanks

Neo29

[Tdol]

I'd use on. With the web, things are not settled, so you will see differences.